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Bi-component sheath-core composite high-stretch fiber and preparation method thereof

A high-elastic fiber and two-component technology, applied in fiber processing, stretch spinning, filament/thread forming, etc., can solve the problems of low color fixing power, low color saturation, weak binding force, etc., and achieve good The effect of dyeing properties

Active Publication Date: 2010-09-29
厦门象屿兴泓特种材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the regular molecular chain and stable chemical properties of polyethylene terephthalate, the binding force with most dyes is weak under ordinary conditions, resulting in the use of polyethylene terephthalate as the skin-core composite. Fibers need harsh conditions such as high temperature and high pressure to be dyed, with low color fixing power and low color saturation

Method used

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  • Bi-component sheath-core composite high-stretch fiber and preparation method thereof
  • Bi-component sheath-core composite high-stretch fiber and preparation method thereof

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preparation example Construction

[0029] The present invention also provides a method for preparing a two-component sheath-core composite high elastic fiber, comprising: melting the polyester component in a first screw extruder;

[0030] Melting the polyamide component in a second screw extruder;

[0031] The molten product of the first screw extruder and the molten product of the second screw extruder are extruded through a spinneret to obtain nascent fibers; the polyester component is selected from cationic normal pressure dyeable polyester One or more of polytrimethylene terephthalate, polybutylene terephthalate; the polyamide component forms the sheath part of the as-spun fiber, and the polyester component forms the The inner core part of the as-spun fiber;

[0032] The as-spun fibers are cooled, oiled, drawn, and wound in sequence to obtain bicomponent sheath-core pre-oriented fibers;

[0033] The pre-oriented fiber is subjected to false-twist deformation treatment to obtain a bicomponent sheath-core co...

Embodiment 1

[0042] Take 35 pieces of PA6 slices and 65 pieces of ECDP slices and dry them in a dryer respectively. The drying temperature of ECDP slices is 135°C, and the drying temperature of PA6 slices is 80°C. The dried ECDP chips and PA6 chips were put into different extruders for melting and sprayed out through a tube-type spinneret to obtain primary fibers. The PA6 forms a sheath portion of the spun fiber, and the ECDP forms an inner core portion of the spun fiber. Then, the as-spun fiber is subjected to side blowing cooling and shaping through a cooling and blowing device, the cooling temperature is 23°C, and then oiled through an oil nozzle, the oil agent is 8wt% siloxane emulsion, and the oil content of the fiber after oiling is 1%. Then, after the fiber is drafted with a total draft ratio of 2.5, it enters the winding machine for mechanical winding and forming. The winding speed is 3200m / / min, and it is placed for 36 hours to remove the stress to obtain a two-component skin-core...

Embodiment 2～ Embodiment 4

[0046] PA6 and ECDP are respectively 20: 80, 40: 60, 50: 50 by weight ratio in embodiment 2~embodiment 4, prepare two-component sheath-core type composite high-elastic fiber according to the method of embodiment 1, and use this fiber Preparation of fabrics and dyeing, measured fiber comprehensive properties and dyeing properties are shown in Examples 2 to 4 in Table 1 and Table 2, respectively.

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Abstract

The invention provides a bi-component sheath-core composite high-stretch fiber. The bi-component is a polyester component and a polyamide component respectively, wherein the polyamide component forms an outer sheath part; the polyester component forms an inner core part; the outer sheath part is coated around the inner core part; and the polyester component may be one or more of a cationic normal-pressure dyeable polyester, a polytrimethylene terephthalate and a polybutylene terephthalate. As the bi-component sheath-core composite high-stretch fiber provided by the invention utilizes a polyester of which a molecular chain has flexible branched chains, such as the cationic normal-pressure dyeable polyester, the polytrimethylene terephthalate, the polybutylene terephthalate and the like, the prepared composite fiber is looser, and dyes can enter the fiber more easily to achieve higher dying performance under a conventional dying condition. The invention also provides a preparation method for the bi-component sheath-core composite high-stretch fiber.

Description

technical field [0001] The invention relates to the field of fiber spinning, in particular to a composite high elastic fiber and a preparation method thereof. Background technique [0002] Composite fiber refers to a chemical fiber made of two polymers, two or more polymers, or the same polymer with different properties through composite spinning, and contains two or more immiscible components in the cross section of the fiber. point. According to the structure, common composite fibers include side-by-side type, sheath-core type, island-in-the-sea type, split type, etc. [0003] Two-component sheath-core composite high-elastic fiber refers to the composite spinning process that uses polyamide as the outer skin part and polyester as the inner core part to compound the as-spun fiber, and obtains elastic double-component fibers after drafting and false twisting deformation. Composite fibers. It has high strength, low density and good elasticity. [0004] In the prior art, w...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F8/12D01D5/34D01D5/088D01D5/096D01D5/12D02G1/02
Inventor 张飞跃蔡世镇徐忠
Owner 厦门象屿兴泓特种材料有限公司
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